www.itv.com/news/2015-07-05/mother-of-tunisian-beach-gunman-says-he-refused-to-kill-a-mouse-because-he-couldnt-kill-anything/
I don't think her upset can even remotely compere to the grief of those whose loved ones were murdered in Tunisia.
However I can't imagine how awful it must feel to find out that your child has done such a terrible thing, and have to live with the guilt of this for the rest of your life.